How to Use a Vac-U-Lock Strap-On Dildo and Harness

So you've decided to try strap-on sex. Before you begin, you'll need the right equipment!

You'll need to ensure your harness and dildo are compatible with one another. But what if you fancy trying a larger or smaller attachment? You might find that your new toy doesn't fit your harness.

To solve this problem, Doc Johnson have created an ingenious strap-on system. Vac-U-Lock is the world's first fully interchangeable pleasure system which enables you to enjoy strap-on sex, without worrying about O-rings, flared bases and appendage girths.

All you need to do is check whether the toy is Vac-U-Lock friendly, and you're good to go!

All Vac-U-Lock products are made from durable materials and chances are once you've bought one, you won't need to buy another for a very, very long time.

The Essentials

How does it work?

Unlike most strap-ons which require an O-ring set up, Vac-U-Lock strap-ons feature a unique plug system which securely holds your attachment in place for penetrative fun. By using a plug instead of an O-ring, Vac-U-Lock harnesses are compatible with all Vac-U-Lock attachments, no matter the size or girth of the attachment you'd like to use.

Each Vac-U-Lock attachment is designed with a purpose-built hole in the bottom which fits perfectly over the patented plug. To attach your dildo to the harness, simply push your chosen toy onto the the plug and voilà! You're ready to roll.

Because you don't have to feed the attachment through an O-ring, you won't need to work out whether its girth is compatible with your harness and O-ring. This makes shopping for new attachments online even easier, and gives you the freedom to experiment with different proportions.

If you like the idea of Vac-U-Lock, but already have traditional flared base strap-on toys, fear not! Doc Johnson have also created a 'Platinum' version of the harness which is compatible with both Vac-U-Lock and flared based toys.

Take A Closer Look

Doc Johnson have created a range of Vac-U-Lock products and accessories to satisfy every need, want and fancy! Scroll through these key products to learn about each one. Perhaps you'll be inspired to try one yourself?

It might not look like much, but the experts at Doc Johnson have mingled science with simplicity to ensure this nifty plug never fails.

Giving the product its name, the plug slips into the base of your chosen attachment, creating a vacuum-lock. This, combined with the two notch shaft, guarantees your new appendage stays in place throughout play.

Attaching via four poppers, the plug promises security during sex, however is supremely easy to remove for cleaning.

All Vac-U-Lock attachments feature a hole in the bottom which perfectly slots over the top of the Vac-U-Lock plug. It is this combination of plug-and-hole which set the Doc Johnson strap-on design apart from competitors, making it truly unique.

Available in a range of lengths, girths, materials and styles, Vac-U-Lock attachments make custom strap-on play unbelievably easy. Choose from G-spot attachments and slender beginners' anal probes, or lifelike UR3 dildos with balls and oversized dongs.

Once you own a Vac-U-Lock harness and plug, any of the Vac-U-Lock attachments will fit perfectly, meaning you never have to convert diameters and circumferences again - hooray!

Designed with four carefully placed internal poppers, Vac-U-Lock harnesses are specially designed to house the Vac-U-Lock plug in a comfortable position for play.

Adjustable and available in a variety of styles, our selection of crotchless thong and jock strap style harnesses help you achieve your preferred level of comfort and exposure.

Some harnesses even feature an extra-wide back support for enhanced comfort and confidence during play with oversized toys.

Vac-U-Lock harnesses are available in gender-specific designs (to leave room for a penis) as well as unisex styles, so always check before your purchase to ensure the harness you're looking at is suitable for the intended wearer.

Vac-U-Lock accessories take your favourite strap-on attachments, and turn them into custom toys which you can enjoy alone or with a partner.

Using the same plug-in design, transform your dildo into a new toy by attaching it to a Vac-U-Lock accessory. You can connect your toy to a wand vibrator attachment, or even a ball gag!

Alternatively, take two attachments and turn them into a double-ended dildo for shared fun with the double-ended plug. You can even turn your toy into a sexy knuckle duster or flogger for themed exploration.

Again, all Vac-U-Lock accessories are compatible with all Vac-U-Lock attachments, so by adding an accessory to your toy boy, you immediately upgrade the toys you already own!

Doc Johnson's Vac-U-Powder has two main uses. One is to help with attaching your dildo to your harness, and the other is for toy maintenance. You'll find a free sample of powder in any complete set, but you'll probably want to purchase more for when your sample runs out.

For application, squeeze a generous amount into the hole on the bottom of your attachment before pushing onto the Vac-U-Lock plug. It will help you affix your chosen dildo and maintain proper suction.

Made in the same way as renewer powder, Vac-U-Powder can also be used to maintain the real-feel of Doc Johnson's UR3 sex toys. Just add a generous sprinkle after cleaning to keep your toy feeling oh-so-lifelike.

How to Shop Vac-U-Lock

Doc Johnson make it even easier to shop for Vac-U-Lock by colour coding all the packaging. Remember to look at the key features for each set to make sure you're happy with the fit of the harness and the size of the attachment.

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